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HP-GL, short for Hewlett-Packard Graphics Language and often written as HPGL, is a printer control language created by Hewlett-Packard (HP). HP-GL was the primary printer control language used by HP plotters. [1] It was introduced with the plotter HP-9872 in 1977 and became a standard for almost all
In computers, a printer driver or a print processor is a piece of software on a computer that converts the data to be printed to a format that a printer can understand. The purpose of printer drivers is to allow applications to do printing without being aware of the technical details of each printer model.
The HP 7470 had two pens, one on either side and plotted on ANSI A (8.5 x 11 inch) or A4-sized paper. [3] It was much less expensive than the previous flatbed design. It was very heavy but had 4 pens. The HP 7475 used a rotating carousel with six pens. That plotter was used in greeting card kiosks.
Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1] Inkjet printers were the most commonly used type of printer in 2008, [ 2 ] and range from small inexpensive consumer models to expensive professional machines.
The standard size 1627 Model 1 was a Calcomp model 565 plotter and used 12-inch-wide paper (305 mm) with a plotting area of 11 inches (280 mm). Model 1 could operate at 18,000 steps per minute. Model 2 was a Calcomp 563 and used 31-inch-wide paper (787 mm) with a plotting area of 29 + 1 ⁄ 2 inches (750 mm). Model 2 could operate at 12,000 ...
As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time, this is known as a traffic jam [3] [4] or (informally) a traffic snarl-up [5] [6] or a tailback. [7] Drivers can become frustrated and engage in road rage. Drivers and ...